It is during the Pleistocene epoch that modern humans finally evolved from their hominid and primate forebears (200,000 years BP). An often used moniker for the modern human mind is the “stone age” mind. This conjures images of “caveman” hunter & gathers battling the ice-age elements and avoiding dangerous predators. However it is believed that modern humans had their genesis within the more benign savannah environments of East Africa (Evans & Zarate, p. 45) and then moved out of Africa as early as 100,000 years BP. (Howe, 2003, p. 63).

The 1.5 – 1.6 million year period of time humans spent in Africa was “a period of extraordinary constancy and continuity” (Kanazawa, 2004, p.514)

 The 1.5 – 1.6 million year period time humans spent in Africa was “a period of extraordinary constancy and continuity” (Kanazawa, 2004, p.514). This meant that the range of adaptive problems faced by humans both caused by the physical and social environment also remained constant over the period and as a result evolutionary processes (through natural selection) had sufficient time to “design” modules that were specifically adapted towards human life within an East African savannah environment. This is technically described as the Environment of Evolutionary Adaptedness ie. the environment to which modern humans appear to have been adapted to (Hagen, 2004); in other words  the environment to which a species has adapted 'itself' to.

  So rather than a “stone-age mind”, it might more accurate to describe the modern human mind as fundamentally being a “savannah mind”